A new hybrid algorithm for simultaneous size and semi-rigid connection type optimization of steel frames

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• 作者：Ali Hadidi ; Amin Rafiee
• 关键词：Big Bang ; Big Crunch ; Harmony Search ; hybrid optimization algorithm ; size optimization ; steel frames ; semi ; rigid connections
• 刊名：International Journal of Steel Structures
• 出版年：2015
• 出版时间：March 2015
• 年：2015
• 卷：15
• 期：1
• 页码：89-102
• 全文大小：870 KB
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• 作者单位：Ali Hadidi (1)
  Amin Rafiee (1)
  
  1. Department of Civil Engineering, University of Tabriz, Tabriz, Iran
  
• 刊物类别：Engineering
• 出版者：Korean Society of Steel Construction, co-published with Springer
• ISSN：2093-6311

文摘

A hybrid algorithm based on Harmony Search (HS) and Big Bang-Big Crunch (BB-BC) optimization methods is proposed for optimal design of semi-rigid steel frames. The algorithm selects suitable sections for beams and columns and assigns suitable semi-rigid connection types for beam-to-column connections, such that the total member plus connection cost of the frame, is minimized. Stress and displacement constraints of AISC-LRFD code together with the size constraints are imposed on the frame in the design procedure. The nonlinear moment-rotation behavior of connections and P-Δ effects of beam-column members are taken into account in the non-linear structural analysis. Three benchmark steel frames are designed and the results are compared with those of standard BB-BC and of other studies. The comparisons demonstrate that proposed algorithm performs better than standard BB-BC and HS methods in all examples and that the total cost of a frame can be reduced through suitable selection of its beam-to-column connection types.